Airman 1st Class Armand Vidovic, 18th Civil Engineer Squadron explosive ordnance disposal technician, wraps detonation cord around a block of C4 explosive at Kadena Air Base, Japan, Dec. 15, 2021. Wrapping C4 in detonation cord eliminates the need for using blasting caps, a more sensitive explosive initiator. (U.S. Air Force photo by Airman 1st Class Yosselin Perla)